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Letters Patent No. 76,442, dated April 7, 1868.

IMPROVEMENT IN THE LININGSOF FURNAGES.

tithe rlgthule tefemh tu in tigen Estima ndert :mi: mating piti uf tljestmt.

Be it', known that I, B.- A'. HAYCOCK, of Richland, in the county ofKeokuk, and State of Iowa, have -inventeda new and' useful Improvementin ALining Furnaces lend I do hereby declare that the following isavfull, clear, and exact description thereof, which will enable.' othersskilled 'in the art to make and use the same,

reference being had to the accompanying drawing', forming'part o'f thisspecification.

This invention relates to a new and improved method of lining' thefireplace or furnace of stationary steamboilers; and the inventionconsists in forming atsolid lining of clay'withinlthe outer walls, andenclosing the ireplace, as will be hereinafter described. i I

The drawing represents a front sectional elevation of a .steam-boilerarch, with Ythe boiler in plane, the front wall or'arch-plate beingremoved, in order toshow the lining to better-advantage.

' represents the steamboiler; B, the'outer walls of the arch; G is thelining; D represents the furnace, land E the gra-te; F, the height ofthebridgenrall o`r back end of -the'furnace. I

The ordinary mode of lining the furnace is to build the sides andbridge-wall up with lire-brick, or with common brick. In many sectionsof the country the former artielevcannot .be obtained without greattrouble and expense, and the latter require tobe renewed so frequently,in consequence'of their destruction-by the heat, that such walls `are aconstant source of expense.l After being long troubled and annoyed bythe difficulties incident to thisstate of things, Itri'e'd theexperiment ol' filling in the sides of my furnace with solid clay, withthe view of overcoming the diiculty, and have succeeded to my entiresatisfaction.

In carrying out my invention, I prepare for filling in the clay byplacing a. framc,`lC, on each side of thc fui-nace, forming spaces-forthe clay, as seen in the drawing. After properly prepnringthe clay, Ifill thesel spaces full, renaming-101;' tamping down the-clay into asolid mass, as vseen at C. The frames C are then removed or burned out,and adire can be built when the lining becomes a little dry, when, aftera short time, the clay will be found to have heen-thoroughly burned, andto form one solid brick, which withstands the effects of the heat, andobviates all diculty. 'The bridge-wall may be formed in the same manner.i

The lining or fire-wall thus formed in one mass, having no angles whichare exposed tothe intense heat to crack ot, withstands the effects ofthe heat for a long-time without material injury. 1

What I claim es new, and desire tcsecure by Letters Patent, is-

A furnace orreplace-lining for'steam-boilers, formed of clay,substantially .in the manner herein shown und described. i I I y B; A.HAYCOCK. Witnesses Wn. Z Bonson,

S. Nonnfrxr..

